source: mainline/uspace/drv/audio/sb16/mixer_iface.c@ e7ac0feb

/*
 * Copyright (c) 2011 Jan Vesely
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/** @addtogroup drvaudiosb16
 * @{
 */
/** @file
 * Main routines of Creative Labs SoundBlaster 16 driver
 */

#include <ddf/driver.h>
#include <errno.h>
#include <audio_mixer_iface.h>

#include "mixer.h"
#include "sb16.h"

static sb_mixer_t *fun_to_mixer(ddf_fun_t *fun)
{
        sb16_t *sb = (sb16_t *)ddf_dev_data_get(ddf_fun_get_dev(fun));
        return &sb->mixer;
}

static errno_t sb_get_info(ddf_fun_t *fun, const char **name, unsigned *items)
{
        sb_mixer_t *mixer = fun_to_mixer(fun);

        if (name)
                *name = sb_mixer_type_str(mixer->type);
        if (items)
                *items = sb_mixer_get_control_item_count(mixer);

        return EOK;
}

static errno_t sb_get_item_info(ddf_fun_t *fun, unsigned item, const char **name,
    unsigned *max_level)
{
        sb_mixer_t *mixer = fun_to_mixer(fun);
        return sb_mixer_get_control_item_info(mixer, item, name, max_level);
}

static errno_t sb_set_item_level(ddf_fun_t *fun, unsigned item, unsigned value)
{
        sb_mixer_t *mixer = fun_to_mixer(fun);
        return sb_mixer_set_control_item_value(mixer, item, value);
}

static errno_t sb_get_item_level(ddf_fun_t *fun, unsigned item, unsigned *value)
{
        sb_mixer_t *mixer = fun_to_mixer(fun);
        return sb_mixer_get_control_item_value(mixer, item, value);
}

audio_mixer_iface_t sb_mixer_iface = {
        .get_info = sb_get_info,
        .get_item_info = sb_get_item_info,

        .get_item_level = sb_get_item_level,
        .set_item_level = sb_set_item_level,
};
/**
 * @}
 */